RiffCards is a minimal riff notebook built for musicians who need to capture ideas fast and recall them on stage. Build a card for every riff, song, or idea. Each card holds tab grids, chord stamps, and free-text notes — all in one place. FEATURES Tab Grid • Visual grid editor for writing tabs and chord voicings • Stamp full chords with a single tap — guitar and bass voicings included • Arpeggio mode: expand any chord into individual notes across the grid automatically • Supports standard tuning and common alternate tunings Perform Mode • Full-screen read-only view built for the stage • Transpose any card up or down by semitone — no rewriting required • BPM display with tap tempo Playlists • Group cards into set lists for rehearsal or performance • Reorder and manage on the fly Organize & Sync • Export your entire notebook to a JSON file and share or back it up anywhere • Import from a backup to restore or move between devices Everything is stored locally on your device. No account, no cloud, no subscription. RiffCards is for guitarists, bassists, and anyone who needs a fast, reliable way to keep their musical ideas organized.